Lamp



July 16,'1929. i I M. mz -1.721,42:

` LAMP- Filed Aug. 30, 1927 Patented July 16, 1929.

ALBERT J. U'rz, or BITTSBURG, KANSAS.

LAMP.

This invention relates to lamps and is more particularly concerned with portable carbide lamps such as are used in mines, etc. 1n the use of this type of lamp, the burner nozzle in Atime becomes clogged with a fine carbon deposit which gradually impairs the efficiency of the lamp and reduces its illuminating power.

1t has been the practice in the past to remove the burner tip and scrape or otherwise dislodge the accumulated carbon deposit therefrom. Under this practice, the lamp is out of use for this period, and its eficiency is gradually reduced up to thev time its burner is removed.

1t is the object of my invention to provide simple, inexpensive means applicable to eX- isting standard constructions of lamps of this type and arranged to be actuated by the user of the lamp as frequently as desired to force carbon deposit from the burner nozzle. rllhis means will form part of the permanent equipment of the lamp, and because of this, it will always be possible to maintain the burner nozzle free from obstructing` carbon and thereby to secure maximum illumination.

The invention provides a construction vapplicable to standard lamp types without interference with or disarran'gement of their parts, and in its preferred form, as shown in the acconmanying drawings forming part thereofand in which Figure 1 is a view in elevation of astandard form of :ai-bide lamp with the nozzle cleaning means-of the present invention embodied therein.

Figure 2 is a horizontal sectional view through lamp above the burner nozzle as in dic-ated by the line of section 2 2 of Figure Figure 3 is a vertical section on an enlarged scale, through the upper portion of the lamp shown in Figure 1, taken on the line 3 3 of Figure 2, and

Figure t is a detail ofthe nozzle cleaning wire.

Referring to the drawings by numerals, 1 indicates the carbide holder of a lamp of standard construction, which has the usual wire and bead detachable connection with the lower flange 2 of the neck 3, the upper end of whichl is formed with an inturned flange 4 serving as a seat forr the base 5 of water chamber G having a cupped closure l7 for lts upper end. rl`he usual water feed tube 8 is secured to and projects beyond the closure 7, its lower end extending through the base 5 and down into the carbide holder `1. A rod 9 (Fig. 2) extends down through the tube and` carries the usual valve atvits lower end (not shown) and an operating crank 10 at its upper end. The usual supporting hook 11 isvshown attachedto the chamber 6. v

`Within' this chamber and fixed to its base 5 by the lower end of a boss 12 at its inner end, is a burner tube 13. The outer end of thistube, which is of known construction, is threaded and extends through the side of the chamber G. That portion ofthe tube projecting beyond the chamber is formed with a tapered socket in which is fitted a similar 'tapered thimble 14 housing the burner head 15, having a bore coincident with that of the tube 13. The outer end of the burner head 15 is closed by a burner tip 1'6 having a very restricted gas eXit bore which is of very substantially reduced diameter relatively to the bore of the gas tube itself. This tube bore, assceu in- Figure 3, is angled, there being a downward extension 17 of the boreA at the inner end of the tube which extension` alines with an opening 18 in the base 5 of thewater chamber 6 to receive and conduct to the burner head, gas generatedin the V`carbide chamber.1,'the edges yof the gas tube having` fiuid tight connection with the inner face of the chamber 6 surrounding the opening 18, this being` effected by suitable solder or'other means. The construction so far described is that of a standard form of portable carbide lamp.

The inventioninvolved herein,` as previously outlined, may be applied to this particular construction in thev following ymamV ner:

The bore of the gas or burner tube 13 in alinement with the burner head and restricted gas exit bore is counterbored at its inner end. A flexible sleeve 19 of av diameter affording a close fit for said bore is inserted therethrough from its inner end to engage with the inner end of the burner tip side of and in line with the gas passages 17, 18l is provided with a suitable opening 19a to conduct the gas to the burner` head.l

This tube, as Will be seen in Figure 2, being flexible, lcan be bent at such angle or angles as may be necessary to permit it to enter the burner tube Without interfering With any of the elements of the lamp as, for example, the Water feed tube. The flexible sleeve 19 which forms a guide and inclosurev for a flexible cleaning needle, is inserted through the side of thezwater chamber' 6 and extends exteriorly thereof; Its junction with the Water chamber is madewvater tight by appropriate means, and its outer endV is exteriorly threaded and at its outer end interiorly reduced in diameter by a suitable plug to provide a restricted bore corresponding substantially to the bore of the restricted gas exit. A flexible cleaning needle 20 of a diameter closely to lit this restricted bore and to it that of the gas exit tip 16 and of suiicient length to extend therethrough is provided. The outer end of this needle is provided with a head'21 seating and having gasv tight Contact with the outer end ot the bore in a. knurled-thimble 22 constituting an operating handle. The inner endjof the bore of this thimble is threadedl for engagement With the exteriorly threaded end oit the needle sleeve 19. The restricted bore of the sleeve in conjunction with the head ot the needle and the threaded engagement of the knurled thimble With the sleeve provide a gas tight connection. The length of the flexibleneedle is such that when the thimble is fully screwed up upon the end of the flexible tube to bring the needle head against the end of the tube, the end of the needle will be projected slightly beyond the burner tip as indicated in Figure 3. As also indicated i'n that figure, the thimble 22 is provided With a threaded shank of suliicient length to permit the thimble to be rotated to fullyl retract the needle vfrom the'burner tip Without losing the threaded engagement with the sleeve 19. `The needle being given a rotary movement through the turningv of Vthe thimble 22' will not only' remove any loose carbon formed in the burner tip, but Will scrape any hardv carbon that may adhere to the sides of the tip bore. Since the cleaning devicev above described forms a permanent part of the lamp equipment, it may be operated at frequent intervals, and the etliciency of the burner maintained at a maxi- Vmum atv all times.

Having described my invention, What I claim and desire to secure by Letters Patent is 1. In a gas burning lamp, a casing enclosing a gas chamber and mounting internally a gas tube having a lateral gas intake at its inner end and provided at its outer end With a burner head projecting through said casing and having a restricted gas exit bore, a sleeve extending` from the exterior through said casing and having its inner end extended through, andof Vcoincident external diameter with, the bore oit said gas tube, said sleeve having an internal bore greater than that of said restricted-gas exit and terminating` at and in alinement with said burner head and its exit bore and having a gas inlet opening therein registering with the lateral gas intake of said gas tube, a cleaning needle housed in said sleeve and extending therethrough to said gas exit bore, said needle having a diameter approximately coincident With that of said exit bore to project therethrough, and less than that of said sleeve to permit the flow of gas therethrough, and an operating head for said needle having gas tight connection'with the outer end of said sleeve externally of the casing.

2. In a gas burning lamp, a casing enclosing a gas chamberand mounting internally a transversely extending gas tube having a lateral gas intake at its inner end and having its outer end provided with a burner head projecting beyond the casing and having a restricted gas exit bore, a sleeve extending from the exterior of the casing through the bore of said gas tube to and in alinement With its burner head, said sleeve having an external diameter coincident with and closely fitting that of the tube bore and having a gas intake opening therein registering wvith the lateral gas intake of the tube to receive gas therefrom and conduct it to the burner head, acleaning needle housed in said sleeve having a diameter coincident with that of said gas exit bore and less than that of said sleeve to permit the 'flow of gas therethrough, and an. operating thimble rigidly holding the outer end of said needle andY having a threaded gas-tight mounting on the outer end of said sleeve to both rotate and longitudinally advance and retract said needle relatively to the burner head and its gas exit bore.

ALBERT J. UTZ. 

